Ok so title says it all i cant go back to end as my game crashes trying to get out but can u build nether portal there. Not quite sure why you would want to but just wondered if anyone has tried
Sorry you can't build a neither portal in the end. There are others with this problem as well and a number of solutions that might prove to be fruitful. Try searching the forums and seeing what you can find.
What you'll need to do is have someone else enter your world and remove any framed maps you may have.
Stay fluffy~